Shield-nozzle



. (No Model.) W. 1:'. CUNNINGHAM.

SHIELD NOZZLE.

Patented Oct. 29, 1895.

@a e l @.WNW M m mf UNIT-ED YSTATES PATENT OFFICE.

WILLIAM F.` CUNNINGHAM, OF BROOKLYN, YORK.

y SHIELD-Nozzte.

SPECIFICATION forming part of VLetters Patent No. 548,775, dated October29, 1895. Application led January 16, 1895. Serial No. 535,080. (Nomodel.)

To va/ZZ whom it may concern:

Be it known that I, WILLIAM F. CUNNING- HAM, of Brooklyn, in the countyof Kings and State of New York, have invented a new and usefulImprovement in Shield-Nozzles, of'

which the following is a specification.

My invention relates to an improvement in shield-nozzles particularlyadapted for use in connection with tireextinguishing hose to formashield of waterin front of the iireman opened or closed at pleasure bythe party manipulating the discharge end of the hose. A practicalembodiment of my invention is v represented in the accompanyingdrawings, in

which- Y Figure 1 represents a longitudinal section of the nozzle; Fig.2, a transverse section through line :1c-of Fig. l, and Fig. 3 alongitudinal section through a nozzle provided with a differentstructure of stuffing-box.

It is intended that the nozzle here shown shall be adapted at its basefor attachment to the discharge end of hose such as is in com mon use.

VThe body of the nozzle is denoted by A andl is provided intermediate of.its ends, preferably near theldischarge end, with one or more openingsa' through its wall. In practice I prefer to make fonrof these openings,two on one'side and two'more diametrically opposite.

The sleeve B, provided with an annular re cess?) around the interior ofits end toward the nozzle, has a Vscrew-threaded portion b along itsinterior, adapted to engage a. screw-V threaded portiona/ on theexterior of the body of the nozzle. The end of the sleeve B, toward thevdischarge end of the nozzle, is slightly beveled, as shown at b2, andforms one wall of the annular lateral dischargeopening. The bevel b2 isintended to give the wall ofV water which is discharged laterally fromthe nozzle to form a shield a slight for- Y ward inclination,and thisinclination may be in the trials thus far made. The opposite wall of.the annular discharge opening is formedv by a nut O, provided with ascrewf threaded portion c, adapted to engage a screwthreaded portion a2on the exterior of the body of the nozzle.

The sleeve B, at its end toward the base of the nozzle, is provided4with an annular tongue b3, adapted to slide within an annular recess d3,formed in the face of a thickened or bulged portion 0,4 of the nozzle A.Intermediate of the tongue b3 and the exterior of the body A of thenozzle, between the end of the sleeve B and the face of the bulge'a4,-Ilocate an elastic packing'D, which may be, for all practical purposes,an annular ring of gutta-percha.

As represented in Fig. l, the nut O is screwed home and the sleeve Biswithdrawn from the nut C to open the annular discharge-opening E. Whenso adjusted, thepressure of the water within the annular chamber formedby the recess b, which communicates with the interior of the nozzle Athrough the openings a, will force the water through the opening E,forming a sheet or wall of water in advance of the operator carryingforward the nozzle, which wall of water will drive back the smoke andilamefrom his faceand body, permitting him thereby to safely travelprojection b4 for the reception of the interiorly-screw-threaded end ofthe stuftlng-box ring F, adapted to compress a ring of elastic materialf between it and the end of the sleeve B and`thereby close the jointtightly between the sleeve and the exterior of the nozzle A.

It is obvious that slight changes might be resorted to in the form andarrangement'of the several parts described without departthroughsmoke'and flame to adjust the hose IOO ing from the spirit and scope ofmy invention. Hence I do not wish yto limit myselfI strictly to thestructure herein set forth; but

What I claim is- 5 The combination with the discharge nozzle providedwith a thickened portion having an annular recess in its face and;having open# ings through the body of the discharge nozzle, of aninteriorly recessed sleevehaving a ,y ro screur threaded engagement withthe exterior of the body of the nozzle and provided with an annulartongueadapted to enter the said annular recess in the thickened portionof thefbody of the nozzle and a nut having a screw threaded engagementwith the exterior 15 of the body of the nozzle and forming an abutmentfor one end of the said recessed sleeve to close a discharge passagebetween said nut and'sleeve, substantially as set forth.

WILLIAM F. CUNNINGHAM.

Witn esses FREDK. HAYNES, GEORGE BARRY.

